666 lines
19 KiB
C
666 lines
19 KiB
C
#ifndef _LINUX_EFI_H
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#define _LINUX_EFI_H
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/*
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* Extensible Firmware Interface
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* Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Stephane Eranian <eranian@hpl.hp.com>
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/time.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/rtc.h>
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#include <linux/ioport.h>
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#include <linux/pfn.h>
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#include <linux/pstore.h>
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#include <asm/page.h>
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#define EFI_SUCCESS 0
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#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
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#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
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typedef unsigned long efi_status_t;
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typedef u8 efi_bool_t;
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typedef u16 efi_char16_t; /* UNICODE character */
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typedef struct {
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u8 b[16];
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} efi_guid_t;
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#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
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((efi_guid_t) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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/*
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* Generic EFI table header
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*/
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typedef struct {
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u64 signature;
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u32 revision;
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u32 headersize;
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u32 crc32;
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u32 reserved;
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} efi_table_hdr_t;
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/*
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* Memory map descriptor:
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*/
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/* Memory types: */
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#define EFI_RESERVED_TYPE 0
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#define EFI_LOADER_CODE 1
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#define EFI_LOADER_DATA 2
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#define EFI_BOOT_SERVICES_CODE 3
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#define EFI_BOOT_SERVICES_DATA 4
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#define EFI_RUNTIME_SERVICES_CODE 5
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#define EFI_RUNTIME_SERVICES_DATA 6
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#define EFI_CONVENTIONAL_MEMORY 7
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#define EFI_UNUSABLE_MEMORY 8
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#define EFI_ACPI_RECLAIM_MEMORY 9
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#define EFI_ACPI_MEMORY_NVS 10
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#define EFI_MEMORY_MAPPED_IO 11
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#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
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#define EFI_PAL_CODE 13
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#define EFI_MAX_MEMORY_TYPE 14
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/* Attribute values: */
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#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
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#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
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#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
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#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
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#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
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#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
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#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
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#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
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#define EFI_MEMORY_DESCRIPTOR_VERSION 1
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#define EFI_PAGE_SHIFT 12
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typedef struct {
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u32 type;
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u32 pad;
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u64 phys_addr;
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u64 virt_addr;
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u64 num_pages;
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u64 attribute;
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} efi_memory_desc_t;
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typedef struct {
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efi_guid_t guid;
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u32 headersize;
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u32 flags;
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u32 imagesize;
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} efi_capsule_header_t;
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/*
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* Allocation types for calls to boottime->allocate_pages.
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*/
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#define EFI_ALLOCATE_ANY_PAGES 0
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#define EFI_ALLOCATE_MAX_ADDRESS 1
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#define EFI_ALLOCATE_ADDRESS 2
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#define EFI_MAX_ALLOCATE_TYPE 3
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typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
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/*
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* Types and defines for Time Services
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*/
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#define EFI_TIME_ADJUST_DAYLIGHT 0x1
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#define EFI_TIME_IN_DAYLIGHT 0x2
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#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
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typedef struct {
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u16 year;
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u8 month;
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u8 day;
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u8 hour;
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u8 minute;
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u8 second;
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u8 pad1;
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u32 nanosecond;
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s16 timezone;
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u8 daylight;
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u8 pad2;
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} efi_time_t;
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typedef struct {
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u32 resolution;
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u32 accuracy;
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u8 sets_to_zero;
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} efi_time_cap_t;
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/*
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* EFI Boot Services table
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*/
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typedef struct {
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efi_table_hdr_t hdr;
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void *raise_tpl;
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void *restore_tpl;
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void *allocate_pages;
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void *free_pages;
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void *get_memory_map;
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void *allocate_pool;
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void *free_pool;
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void *create_event;
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void *set_timer;
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void *wait_for_event;
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void *signal_event;
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void *close_event;
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void *check_event;
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void *install_protocol_interface;
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void *reinstall_protocol_interface;
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void *uninstall_protocol_interface;
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void *handle_protocol;
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void *__reserved;
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void *register_protocol_notify;
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void *locate_handle;
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void *locate_device_path;
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void *install_configuration_table;
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void *load_image;
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void *start_image;
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void *exit;
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void *unload_image;
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void *exit_boot_services;
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void *get_next_monotonic_count;
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void *stall;
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void *set_watchdog_timer;
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void *connect_controller;
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void *disconnect_controller;
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void *open_protocol;
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void *close_protocol;
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void *open_protocol_information;
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void *protocols_per_handle;
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void *locate_handle_buffer;
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void *locate_protocol;
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void *install_multiple_protocol_interfaces;
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void *uninstall_multiple_protocol_interfaces;
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void *calculate_crc32;
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void *copy_mem;
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void *set_mem;
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void *create_event_ex;
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} efi_boot_services_t;
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/*
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* Types and defines for EFI ResetSystem
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*/
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#define EFI_RESET_COLD 0
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#define EFI_RESET_WARM 1
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#define EFI_RESET_SHUTDOWN 2
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/*
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* EFI Runtime Services table
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*/
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#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
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#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
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typedef struct {
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efi_table_hdr_t hdr;
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unsigned long get_time;
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unsigned long set_time;
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unsigned long get_wakeup_time;
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unsigned long set_wakeup_time;
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unsigned long set_virtual_address_map;
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unsigned long convert_pointer;
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unsigned long get_variable;
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unsigned long get_next_variable;
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unsigned long set_variable;
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unsigned long get_next_high_mono_count;
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unsigned long reset_system;
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unsigned long update_capsule;
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unsigned long query_capsule_caps;
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unsigned long query_variable_info;
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} efi_runtime_services_t;
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typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
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typedef efi_status_t efi_set_time_t (efi_time_t *tm);
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typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
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efi_time_t *tm);
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typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
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typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
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unsigned long *data_size, void *data);
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typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
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efi_guid_t *vendor);
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typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
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u32 attr, unsigned long data_size,
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void *data);
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typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
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typedef void efi_reset_system_t (int reset_type, efi_status_t status,
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unsigned long data_size, efi_char16_t *data);
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typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map);
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typedef efi_status_t efi_query_variable_info_t(u32 attr,
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u64 *storage_space,
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u64 *remaining_space,
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u64 *max_variable_size);
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typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,
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unsigned long count,
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unsigned long sg_list);
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typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
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unsigned long count,
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u64 *max_size,
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int *reset_type);
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/*
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* EFI Configuration Table and GUID definitions
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*/
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#define NULL_GUID \
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EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
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#define MPS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_TABLE_GUID \
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EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define ACPI_20_TABLE_GUID \
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EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
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#define SMBIOS_TABLE_GUID \
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EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define SAL_SYSTEM_TABLE_GUID \
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EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
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#define HCDP_TABLE_GUID \
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EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
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#define UGA_IO_PROTOCOL_GUID \
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EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
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#define EFI_GLOBAL_VARIABLE_GUID \
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EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
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#define UV_SYSTEM_TABLE_GUID \
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EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 )
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#define LINUX_EFI_CRASH_GUID \
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EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
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#define LOADED_IMAGE_PROTOCOL_GUID \
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EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
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#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
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EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
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#define EFI_UGA_PROTOCOL_GUID \
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EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
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#define EFI_PCI_IO_PROTOCOL_GUID \
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EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
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#define EFI_FILE_INFO_ID \
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EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
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#define EFI_FILE_SYSTEM_GUID \
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EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
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typedef struct {
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efi_guid_t guid;
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u64 table;
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} efi_config_table_64_t;
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typedef struct {
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efi_guid_t guid;
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u32 table;
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} efi_config_table_32_t;
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typedef struct {
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efi_guid_t guid;
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unsigned long table;
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} efi_config_table_t;
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#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
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#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))
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#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))
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#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))
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#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))
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#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))
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#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
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typedef struct {
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efi_table_hdr_t hdr;
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u64 fw_vendor; /* physical addr of CHAR16 vendor string */
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u32 fw_revision;
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u32 __pad1;
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u64 con_in_handle;
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u64 con_in;
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u64 con_out_handle;
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u64 con_out;
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u64 stderr_handle;
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u64 stderr;
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u64 runtime;
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u64 boottime;
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u32 nr_tables;
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u32 __pad2;
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u64 tables;
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} efi_system_table_64_t;
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typedef struct {
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efi_table_hdr_t hdr;
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u32 fw_vendor; /* physical addr of CHAR16 vendor string */
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u32 fw_revision;
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u32 con_in_handle;
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u32 con_in;
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u32 con_out_handle;
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u32 con_out;
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u32 stderr_handle;
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u32 stderr;
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u32 runtime;
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u32 boottime;
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u32 nr_tables;
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u32 tables;
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} efi_system_table_32_t;
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typedef struct {
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efi_table_hdr_t hdr;
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unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
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u32 fw_revision;
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unsigned long con_in_handle;
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unsigned long con_in;
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unsigned long con_out_handle;
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unsigned long con_out;
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unsigned long stderr_handle;
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unsigned long stderr;
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efi_runtime_services_t *runtime;
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efi_boot_services_t *boottime;
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unsigned long nr_tables;
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unsigned long tables;
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} efi_system_table_t;
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struct efi_memory_map {
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void *phys_map;
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void *map;
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void *map_end;
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int nr_map;
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unsigned long desc_version;
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unsigned long desc_size;
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};
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typedef struct {
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u32 revision;
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void *parent_handle;
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efi_system_table_t *system_table;
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void *device_handle;
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void *file_path;
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void *reserved;
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u32 load_options_size;
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void *load_options;
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void *image_base;
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__aligned_u64 image_size;
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unsigned int image_code_type;
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unsigned int image_data_type;
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unsigned long unload;
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} efi_loaded_image_t;
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typedef struct {
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u64 revision;
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void *open_volume;
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} efi_file_io_interface_t;
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typedef struct {
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u64 size;
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u64 file_size;
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u64 phys_size;
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efi_time_t create_time;
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efi_time_t last_access_time;
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efi_time_t modification_time;
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__aligned_u64 attribute;
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efi_char16_t filename[1];
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} efi_file_info_t;
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typedef struct {
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u64 revision;
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void *open;
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void *close;
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void *delete;
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void *read;
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void *write;
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void *get_position;
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void *set_position;
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void *get_info;
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void *set_info;
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void *flush;
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} efi_file_handle_t;
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#define EFI_FILE_MODE_READ 0x0000000000000001
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#define EFI_FILE_MODE_WRITE 0x0000000000000002
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#define EFI_FILE_MODE_CREATE 0x8000000000000000
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#define EFI_INVALID_TABLE_ADDR (~0UL)
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/*
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* All runtime access to EFI goes through this structure:
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*/
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extern struct efi {
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efi_system_table_t *systab; /* EFI system table */
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unsigned int runtime_version; /* Runtime services version */
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unsigned long mps; /* MPS table */
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unsigned long acpi; /* ACPI table (IA64 ext 0.71) */
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unsigned long acpi20; /* ACPI table (ACPI 2.0) */
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unsigned long smbios; /* SM BIOS table */
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unsigned long sal_systab; /* SAL system table */
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unsigned long boot_info; /* boot info table */
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unsigned long hcdp; /* HCDP table */
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unsigned long uga; /* UGA table */
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unsigned long uv_systab; /* UV system table */
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efi_get_time_t *get_time;
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efi_set_time_t *set_time;
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efi_get_wakeup_time_t *get_wakeup_time;
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efi_set_wakeup_time_t *set_wakeup_time;
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efi_get_variable_t *get_variable;
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efi_get_next_variable_t *get_next_variable;
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efi_set_variable_t *set_variable;
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efi_query_variable_info_t *query_variable_info;
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efi_update_capsule_t *update_capsule;
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efi_query_capsule_caps_t *query_capsule_caps;
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efi_get_next_high_mono_count_t *get_next_high_mono_count;
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efi_reset_system_t *reset_system;
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efi_set_virtual_address_map_t *set_virtual_address_map;
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} efi;
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static inline int
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efi_guidcmp (efi_guid_t left, efi_guid_t right)
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{
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return memcmp(&left, &right, sizeof (efi_guid_t));
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}
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static inline char *
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efi_guid_unparse(efi_guid_t *guid, char *out)
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{
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sprintf(out, "%pUl", guid->b);
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return out;
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}
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extern void efi_init (void);
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extern void *efi_get_pal_addr (void);
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extern void efi_map_pal_code (void);
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extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
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extern void efi_gettimeofday (struct timespec *ts);
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extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
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extern u64 efi_get_iobase (void);
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extern u32 efi_mem_type (unsigned long phys_addr);
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extern u64 efi_mem_attributes (unsigned long phys_addr);
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extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
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extern int __init efi_uart_console_only (void);
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extern void efi_initialize_iomem_resources(struct resource *code_resource,
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struct resource *data_resource, struct resource *bss_resource);
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extern unsigned long efi_get_time(void);
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extern int efi_set_rtc_mmss(unsigned long nowtime);
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extern void efi_reserve_boot_services(void);
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extern struct efi_memory_map memmap;
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/**
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* efi_range_is_wc - check the WC bit on an address range
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* @start: starting kvirt address
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* @len: length of range
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*
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* Consult the EFI memory map and make sure it's ok to set this range WC.
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* Returns true or false.
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*/
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static inline int efi_range_is_wc(unsigned long start, unsigned long len)
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{
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unsigned long i;
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for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
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unsigned long paddr = __pa(start + i);
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if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
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return 0;
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}
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/* The range checked out */
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return 1;
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}
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#ifdef CONFIG_EFI_PCDP
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extern int __init efi_setup_pcdp_console(char *);
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#endif
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/*
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* We play games with efi_enabled so that the compiler will, if possible, remove
|
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* EFI-related code altogether.
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*/
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#ifdef CONFIG_EFI
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# ifdef CONFIG_X86
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extern int efi_enabled;
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extern bool efi_64bit;
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# else
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# define efi_enabled 1
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# endif
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#else
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# define efi_enabled 0
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#endif
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/*
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* Variable Attributes
|
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*/
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#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
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#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
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#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
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#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
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#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
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#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
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#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
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#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
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EFI_VARIABLE_BOOTSERVICE_ACCESS | \
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EFI_VARIABLE_RUNTIME_ACCESS | \
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EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
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EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
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EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
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EFI_VARIABLE_APPEND_WRITE)
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/*
|
|
* The type of search to perform when calling boottime->locate_handle
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|
*/
|
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#define EFI_LOCATE_ALL_HANDLES 0
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#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
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#define EFI_LOCATE_BY_PROTOCOL 2
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|
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/*
|
|
* EFI Device Path information
|
|
*/
|
|
#define EFI_DEV_HW 0x01
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#define EFI_DEV_PCI 1
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|
#define EFI_DEV_PCCARD 2
|
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#define EFI_DEV_MEM_MAPPED 3
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#define EFI_DEV_VENDOR 4
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#define EFI_DEV_CONTROLLER 5
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#define EFI_DEV_ACPI 0x02
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#define EFI_DEV_BASIC_ACPI 1
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#define EFI_DEV_EXPANDED_ACPI 2
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#define EFI_DEV_MSG 0x03
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#define EFI_DEV_MSG_ATAPI 1
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#define EFI_DEV_MSG_SCSI 2
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#define EFI_DEV_MSG_FC 3
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#define EFI_DEV_MSG_1394 4
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#define EFI_DEV_MSG_USB 5
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#define EFI_DEV_MSG_USB_CLASS 15
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#define EFI_DEV_MSG_I20 6
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#define EFI_DEV_MSG_MAC 11
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#define EFI_DEV_MSG_IPV4 12
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#define EFI_DEV_MSG_IPV6 13
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#define EFI_DEV_MSG_INFINIBAND 9
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#define EFI_DEV_MSG_UART 14
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#define EFI_DEV_MSG_VENDOR 10
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#define EFI_DEV_MEDIA 0x04
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#define EFI_DEV_MEDIA_HARD_DRIVE 1
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#define EFI_DEV_MEDIA_CDROM 2
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#define EFI_DEV_MEDIA_VENDOR 3
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#define EFI_DEV_MEDIA_FILE 4
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#define EFI_DEV_MEDIA_PROTOCOL 5
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#define EFI_DEV_BIOS_BOOT 0x05
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#define EFI_DEV_END_PATH 0x7F
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#define EFI_DEV_END_PATH2 0xFF
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|
#define EFI_DEV_END_INSTANCE 0x01
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#define EFI_DEV_END_ENTIRE 0xFF
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|
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struct efi_generic_dev_path {
|
|
u8 type;
|
|
u8 sub_type;
|
|
u16 length;
|
|
} __attribute ((packed));
|
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|
|
static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
|
|
{
|
|
*npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
|
|
*addr &= PAGE_MASK;
|
|
}
|
|
|
|
#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
|
|
/*
|
|
* EFI Variable support.
|
|
*
|
|
* Different firmware drivers can expose their EFI-like variables using
|
|
* the following.
|
|
*/
|
|
|
|
struct efivar_operations {
|
|
efi_get_variable_t *get_variable;
|
|
efi_get_next_variable_t *get_next_variable;
|
|
efi_set_variable_t *set_variable;
|
|
};
|
|
|
|
struct efivars {
|
|
/*
|
|
* ->lock protects two things:
|
|
* 1) ->list - adds, removals, reads, writes
|
|
* 2) ops.[gs]et_variable() calls.
|
|
* It must not be held when creating sysfs entries or calling kmalloc.
|
|
* ops.get_next_variable() is only called from register_efivars(),
|
|
* which is protected by the BKL, so that path is safe.
|
|
*/
|
|
spinlock_t lock;
|
|
struct list_head list;
|
|
struct kset *kset;
|
|
struct bin_attribute *new_var, *del_var;
|
|
const struct efivar_operations *ops;
|
|
struct efivar_entry *walk_entry;
|
|
struct pstore_info efi_pstore_info;
|
|
};
|
|
|
|
int register_efivars(struct efivars *efivars,
|
|
const struct efivar_operations *ops,
|
|
struct kobject *parent_kobj);
|
|
void unregister_efivars(struct efivars *efivars);
|
|
|
|
#endif /* CONFIG_EFI_VARS */
|
|
|
|
#endif /* _LINUX_EFI_H */
|